Concentrating table



Aug. 24 ,-1926.;

' 1,597,066 E. DEISTER CONCENTRATING TABLE Filed August 8; 1.924 2Sheets-Sheet 1 INVENTOR.

8 4, Fig (01E) By PM ZZZLQ A TTORNE Y.

Aug. 24, 1926. v 1,597,066

- E. DEISTE R CONCENTRATING TABLE Filed August 8, 1924 2 Sheets-Sheet 28a.; 711. fll

A TTORNEY.

Patented Aug. 24, 19.26.

EMIL, nnisrnn. or m WAYNE, INDIANA- concn-u'rnnr ne Ti -nun.

- Application filed 'Aug ust 8, 1924. Serial No. 780;9'-16'.

The invention relates to concentrating tables of the diiierentia llyreciprocating type, and it is adapted primarily for the separation ofcoal from waste materials that accompany it fromthe mine,jsuch as stone,sand, clay and slate, the ivention being applicable to the concentrationof manyother materials. 1

The object of-the inventionis to -provide a novel formof table that willeffectively separate coal and other valuable material from wasteproducts that accompany the sameand to provide a table having a largecapacity so that theconcentrating operations may be carried-oneconomically.

' The table is designed especially'to: treat materials that are inrelatively small particles, namely, such particles as will pass througha screen having three-quarter inch openings therein. l

Anembodirnent of the inventionis illustrated in theaccompanying-fdrawings in which 7 Figure 1- is a planview of the deck ofa table embodying the invention; Fig. 2 a cross-secti0nal view oniineQ-Q of Fig; 1; Fig. 3 a cross-sectional view n line 3-3 of Fig. 1;Fig. 4 a cross-sectional. view on line-'4.4c ef'Fig. -1;*F-ig. 5" across-sectional view on line 5-5 of Fig. 11;;Fig. cross sectional viewon line 6"6 of F ig; 1 ;-Fig. 7 across-sectionalview on line of Fig; 1;Fig. 8 an exaggeratedcross-sectional view on line 8'8 of Fig; I Fig.-9-an exaggerated cross-sectionalview on l ine9 9 of Fig. 1 and Fig. 10a cross sectional view on line 7 7 of Fig; 1" illustratinga-lnodifiedforni of cover on the deck.- l 1 j In the drawings the' deckof the table only is illustrated, it being understood that the deck-issuitably suppertedf for longitudinal reciprocation and that a drivingmechanism is connected atthehead or motion end 2 of the deck by whichthe deckis difi'erentially re cipr-ocated longitudinally 1 as indicatedby'the arr-ow 3 in Fig- 1 "A'rel a tively high board 4' extends alongthe head end 2 of the deck and another high board 5 extends "along theupper or'feed side 50f the deck;

The deck'in operating positionis inclined transversely downwardly sothat the dis charge sidebis lower thanthafeed side, and any point inthehead end 2-is lower than the point in'the edge'ofehe opposite ordischarge end 7-'th-at is ina line drawn through the said point the headend and parallel to the line of motion of the deck.

The surface of the deck is a pluralityof coterminous sectionsA, B, andCwhich differ in their inclinations. Section'A extends along'the feed-iside of the deck and slopes from the head end 2 toward" the dischargeend'7 (Fig. 2); Italsoslopes transversely from the feed side to itslower boundary indicated by the broken line ab. Sections B and G slopedownwardly from-section A to the dischargesid'e-6, (Figs. 5, 6), thetrans verse slope of section B being greater than that o-f' eithersectionsA or Cl. At t-h'e edge of the discharge end (Slo'f the deck theslope of the section C is thesame' asthat of the section A-sothat said:edge is preferably straight, (Fig. The sections B and C coterminate atthe broken. line -c-d. -Section B. slopes upwardly from the head end Qtothe section G and the section C slopes upwardly from section B to thedischarge end 7 the longitudinal slope of section. C being steeper thanthat. of the section B (Fig. 4 1 The result of the. foregoing sec"-tions is that the deck has-a twisted ef? feet, the corner 'A" of thedeck being the highest, the corner B being lower than the corner A,theccrner G being lower than: the corner B and the corner Dir being thelowest corner of the deck. As shown inFi-gs. 8 and 9, a' sectioniof thedeck from corner C to corner B indicates'a con-cave surface onthe deck,and a section from cor- A, B and C.

A suitable covering is placed on the top ner A to corner D indicates aconvex sursurface of the deck. This covering may be linoleum or smoothrubber 8 or a finely corrugated rubber 9-. I prefer to use linoleum orsmooth rubber wherethe materials to be treated are relativelycoarse, andwhere thematerials are relatively fine I prefer to use the corrugatedrubber.

A seleetednumber of: rifles 10 is' secured 'to the deck over the, cover,the riiiles being parallel to each other and disposed at a predeterminedangle to the direction of reciprocation of the deckindicated by thearrow in Fig. 1 The forward ends "of the rifl'les preferably terminateon a diagonal line so that a smoother unriflled space D is presentbetween the said'lineand the' d-is charge end 7 of' the deck, The rifitle's are also tapered at their forward ends. They may be of anyselected height or reduce in height down the transverse slope of thedeck. For most uses of the table I find a. desirable arrangement of therifiies is to arrange them in groups, the. riflles of each group beingof a uniform height and less in height than the group above. Aneffective grouping of the rifiles for treating coal is shown in Fig. 5where the two uppermost riffles constitute the highest group 11, thenext five riiiies. con stitute a second group 12, the next 12 riii lesconstitute a third group 13 and the remain ing riffles constitute fourthgroup 1d. As shown in Fig.1, the diagonal arrangement of rifiies on thedeck is such that the forward end or terminal of each riflle is nearerto the discharge side 6 than is the rear or head end of saidriiile tosaidside. V

If desirable, in treating fine materials, high riffles 15 may beprovided in order to form pools over certain of the riffles tofacilitate the stratification of the materials on the deck in the wellknown manner.

A feed box 16 is supported on the board 5 adjacent to the head end 2 ofthe deck and a dressing water launder 17 is sup ported on said board andextends from the feed box toward or to the discharge end 7.

Where the corrugated cover 9 is used it is so placed on the deck thatits corrugations will be parallel to the riflles when the latter aresecured to the deck, and when so ar ranged the surface of the deckbetween each two riffles is corrugated, the relatively fine channelsformed by the corrugations tending to assist the riffles in directing orguiding the materials caught by the riiiles toward the discharge end 7.The cover 9, when used, is placed over the entire upper surface of thedeck so that the space D is finely corrugated and facilitates theguiding of the heavier or waste materials to the discharge end 7 of thedeck.

Since the longitudinal inclination of the surface of the deck at thefeed side thereof is less than the longitudinal inclination thereof atthe discharge side, the greater proportion or bulk of the heavierparticles is caused to move on the section A to the dis' charge end 7 ofthe deck and the lighter particles are rapidly released from the massand caused to discharge at the discharge side 6, the relatively steeptransverse inclination of the section B expediting materially themovement of the lighter particles to the side 6. Such heavier particlesas reach the sections B and C meet the greater resistance of the steeperlongitudinal slopes of those sections, their movement forwardly towardthe discharge end 7 being retarded thereon thus facilitating the releaseand discharge of the lighter particles at the discharge side from thosesections. i I

The twisted effect of the entire surface of the deck is most beneficialin the clean ing of coal, since it expedites materially the separationof the coalparticles from the refuse or waste products and causes arapid discharge of the heavier gangue at the upper portion of thedischarge end 7, the lighter gangue being captured by the lower andsteeper portions of the deck and conveyed thereon to the discharge end7. The table, therefore has a large capacity and practically no refusedischarges over the discharge side 6 and practically no coal. passesover the discharge end 7.

When fine light particles pass out onto the space D the wash waterwashes them down the transverse slope of that space and they move moreor less down the longitudinally inclined section C and pass over thedischarge side 6 rearwardly of the corner C.

t will be noted that each .of the three sections of the surface of thedeck, when the table is in operating position, is twisted or warped ineffect, so that the entire surface is twisted or warpedi This effect maybe secured by building the deck with the severalinclined sections, or byconstructing the table in such a flexible manner that the twisted effectis obtained by adjusting the corners of the deck as to vheight so as tosecure the several coterminous sloping sections on its surface.

What I claim is:

1. In a coal concentrating table, a reciprocating longitudinally andtransversely inclined deck, the feed side of the concentrating surfaceof the deck in operating position being higher than the opposite discharge side thereof, the transverse slope of the concentrating surfaceof the deck downwardly from the feed side to the discharge side beinggreater at the head end than at the discharge end thereof and thelongitudinal slope of said surfaceupwardly from the head end to thedischarge, end being greater at the discharge side. than atthe feed sideofthe deck, and rifiles on the deck extending from the head end towardthe discharge end thereof and diagonal tov the line of reciprocation ofthe deck, the forward ends of the rifiles respectively being nearer tothe discharge side ofthedeck than are the rear or head ends thereof. 7

2. In a coal concentrating table, a reciprocating longitudinally andtransversely inclined deck, the feed side of the concentrat ing surfaceof the deck in operating position being higher than the opposite discharge side thereof, the transverse slope of the concentrating surfaceof the deck downwardly from the feed sid'e'to the discharge side beinggreater at' the head end than at the'discharge end thereof and thelongitudinal slope of said surface upwardly from the head end to thedischarge end be ing greater atthe discharge side than at the feed sideof the deck, and rifiles' on the deck extending from the head end towardthe discharge end thereof, and decreasing in height down the transverseslope of the deck and diagonal to the line of reciprocation of the deck,the forward ends of the riffles respectively being nearer to the.discharge side of the deck than are the rear or head, ends thereof.

3. In a differentially reciprocating concentrating table, alongitudinally and transversely inclined deck, the upward longitudinalslope of the concentrating surface of the deck from the head end to thedischarge end being greater at the discharge side than at the feed sidethereof and the transverse slope of the said surface downwardly from thefeed side to the discharge side being greater at the head end than atthe discharge end thereof, a corrugated cover on the deck, and rifflessecured to the deck over the cover and extending from the head endtoward the discharge end of the deck, the corrugations in the coverbeing parallel to the riiiles the riffles being diagonal to the line ofreciprocation of the deck and having their forward ends respectivelynearer to the discharge side of the table than are the head endsthereof.

4:. In a differentially reciprocating coal concentrating table, atransversely inclined deck having riflles on its concentrating surfacediagonal to the line of the reciprocation of the deck and extending fromits head end toward the opposite discharge end and the discharge sidethereof, the said concentrating surface in operating position being concave in a diagonal direction from the upper portion of the surfaceadjacent the head end and the feed side of the deck toward thediagonally opposite portion of said surface and said surface beingconvex in a diagonal direction from the upper portion of the surfaceadjacent the feed side and the dis charge end of the deck toward thediagonally opposite portion of the said surface.

In witness whereof I have hereunto subscribed my name this 4th day ofAugust,

. EMIL DEISTEB.

